I was wondering about this as well. Infinity Slayer and a "classic" version of slayer will already exist. Will there be a "Halo 4 version" of regular team slayer (i.e. without ordance drops), or is that considered the "classic" version? And then from there, how are the separated?
Infinity Slayer hopper with IS only? Slayer hopper with IS, TS, and CS? 2 of 3?
I figured you'd have your Infinity "War Games" mode over here, and the "Classic" hoppers over there, with the subset of appropriate gametypes under each. It still makes for a lot of playlists at launch not even considering the Living Dead, Grifball, Action Sack, Team Snipers, SWAT varieties.
I know they have a plan, I was just trying to guess their methods.